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Christopher D. French and Christopher J. Schenk, U.S. Geological Survey, Central Energy Resources Team, 2005, Geology of the Gulf of Mexico Region (geolcaribg): U.S. Geological Survey, Central Energy Resources Team.This is part of the following larger work.Online Links:
Christopher D. French and Christopher J. Schenk, U.S. Geological Survey, Central Energy Resources Team, 2005, Map Showing Geology, Oil and Gas Fields, and Geologic Provinces of the Gulf of Mexico Region: U.S. Geological Survey Open-File Report OFR-97-470-L, U.S. Geological Survey, Central Energy Resources Team, Denver, Colorado.Online Links:
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is D_WGS_1984.
The ellipsoid used is WGS_1984.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257224.
| Value | Definition |
|---|---|
| g | Gabbro and related rocks |
| i | Intrusive rocks, undivided, mostly intermediate to silicic |
| J | Jurassic marine and continental strata |
| JTr | Jurassic and Triassic marine and continental strata |
| K | Cretaceous marine strata |
| Ki | Cretaceous plutons, mostly intermediate to silicic |
| Kv | Cretaceous volcanic rocks |
| Kva | Cretaceous andesitic to silicic volcanic rocks |
| lT | Eocene and (or) Paleocene marine strata |
| Mz | Mesozoic sedimentary and volcanic rocks |
| Mzg | Mesozoic metavolcanic and associated metasedimentary rocks |
| Mzm | Mesozoic metasedimentary and metaigneous rocks, low to intermediate metamorphic grade |
| MzPzm | Mesozoic and Paleozoic metasedimentary and metaigneous rocks |
| Pz | Paleozoic strata |
| Pzi | Paleozoic plutons, mostly intermediate to silicic |
| Pzm | Paleozoic and Precambrian metamorphic rocks, undivided |
| Pzv | Paleozoic volcanic rocks |
| Q | Quaternary alluvium |
| QT | Quaternary and Tertiary marine limestone, sandstone, and shale |
| QTc | Quaternary and Tertiary continental deposits |
| Qv | Quaternary volcanic edifices, flows, and pyroclastic deposits |
| Qvi | Quaternary pumice fills and pyroclastic mantles |
| Tc | Tertiary continental strata |
| Ti | Tertiary plutons, mostly intermediate to silicic |
| TK | Tertiary and Cretaceous marine strata |
| TKc | Tertiary and Cretaceous continental strata |
| TKi | Tertiary and Cretaceous plutons, mostly intermediate to silicic |
| TKv | Tertiary and Cretaceous volcanic rocks |
| TKx | Tertiary and Cretaceous complex of deformed sedimentary rocks |
| Tv | Tertiary volcanic rocks |
| u | Ultramafic rocks |
| uK | Upper Cretaceous marine strata |
| Und | Undetermined |
| uT | Post-Eocene marine strata |
| W | Water |
see Age attributes for descriptions
Positive real numbers that are automatically generated.
Positive real numbers that are automatically generated.
Scanning of source map, georeferencing, digitizing, attributing, editing and preparation of geodatabase feature class - Christopher D. French. Metadata Creation - Christopher D. French. Project coordination - Christopher J. Schenk.
U.S. Geological Survey, Central Energy Resources Team
c/o Christopher D. French
GIS Specialist
U.S. Geological Survey, Box 25046, MS 939, Denver Federal Center
Denver, Colorado 80225
USA
303-236-1655 (voice)
303-236-0459 (FAX)
chfrench@usgs.gov
To delineate geologic contacts and thematically depict generalized geologic age of outcrops in Open File Report 97-470-L Surface Geology, Oil and Gas Fields, and Geologic Provinces of the Gulf of Mexico, which was compiled as a reference for the U.S. Geological Survey World Energy Project assessment of undiscovered, technically recoverable oil and gas resources of the world. This dataset was used to produce maps in ESRI ArcMap 8.3 and Adobe Acrobat PDF formats. Files were exported from geodatabase feature class to ESRI shapefile and ArcInfo export formats for use in other applications.
J.E. Case and T.L. Holcombe, 1980, Geologic-Tectonic Map of the Caribbean Region: Miscellaneous Investigations Series Map I-1100, USGS, Reston, VA.Online Links:
- N/A
National Imagery and Mapping Agency, 1997, VMAP_1V10-Vector map Level 0 (Digital chart of the World).
Department of Lands and Surveys, Nassau N P., Bahamas, unknown, Map of Commonwealth of The Bahamas.
P.G. Schruben, R.E. Arndt, W.J. Bawiec, 1994, Geologic Units of the Conterminous United States at 1:2,500,000 Scale -- A Digital Representation of the 1974 P.B. King and H.M. Beikman Map: USGS Digital Data Series DDS-11, U.S. Geological Survey, Reston, VA.Online Links:
Data sources used in this process:
Data sources used in this process:
Data sources used in this process:
Some special geologic age symbols have been modified to use standard character types. Examples of this modification occur in the geologic codes for Triassic, Mesozoic, and Precambrian rock types. No generalization (grouping) was performed on geologic age attributes. Any unidentified polygons on the source map are attributed as "Und" - Undetermined.
The scanned source maps were used as a reference for attributing.
Horizontal positional accuracy was not formally quantified. Some details about the scanning and referencing process along with errors are stated below.
1) The original source map was provided in two plates at a scale of 1:2,500,000. Each plate was scanned at 300 dpi in RGB color mode. Adobe Photoshop 6.0 was used to merge east and west images together at edges. Some discrepancies were noticed on edge match. Edge mismatch was no greater than 500 m in a few areas, while good matches were found elsewhere. Discrepancies were averaged while digitizing.
2) A vector dataset originating from the National Imagery and Mapping Agency (NIMA) Digital Chart of the World (DCW) series was available for georeferencing. This dataset is known to have a nominal scale of 1:1,000,000 and was available as a shapefile from the United States Geological Survey, Digital Data Series DDS-62-A Global GIS Database: Digital Atlas of Central and South America.
3) The ArcMap 8.3 georeferencing tool was used to establish control points and reference merged image. The original maps were provided in Mercator projection with true scale at 19 degrees north latitude. Attempts were made to transform the reference shapefile to the stated projection for georeferencing, but major errors existed along southern edges of map. A geographic coordinate system (WGS_1984) was used with more success. 57 control points were established to perform a 3rd order polynomial transformation. Other transformation methods were attempted along with other control point placement, but resulted in more error. A root mean square (RMS) error of 1611.8 m was recorded.
4) Discrepancies were anticipated between source map shorelines and country boundaries because of scale difference. Other distortions may have been inherent in the source maps. Overall dimensions of map fit well at desired display scale of 1:2,500,000. Discrepancies in shoreline were random and variable, rarely exceeding 3,500 m.
Not Assessed
Complete
Polygon topology exists. Geodatabase topology rules used to identify and correct gaps and overlaps in the polygon feature class. Geodatabase coded domains used for attributing.
Most geologic descriptions follow naming conventions found on the original source map. Some descriptions may be abbreviated. Several polygons were of an undetermined age because of printing problems or lack of clarity on original source map. There was no grouping of ages in the attributing process.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints: None
USGS Information Services
Box 25286 Denver Federal Center
Denver, Colorado 80225
USA
1-888-ASK-USGS (voice)
303.202.4693 (FAX)
ask@usgs.gov
Downloadable Data
This publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.Although all data and software published on this CD-ROM are used by the U.S. Geological Survey, no warranty, expressed or implied, is made by the U.S. Geological Survey as to the accuracy of the data and related materials and (or) the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials.
| Data format: | Contains polygon features depicting geologic contacts of the Caribbean region. in format Shapefile Size: 1.81 MB |
|---|---|
| Network links: |
<http://certmapper.cr.usgs.gov/data/we/ofr97470l/spatial/shape/geolcaribg.zip> |
| Data format: | Contains polygon features depicting geologic contacts of the Caribbean region. in format ArcInfo Export File Size: 4.4 MB |
|---|---|
| Network links: |
<http://certmapper.cr.usgs.gov/data/we/ofr97470l/spatial/export/geolcaribge.zip> |
| Data format: | A web-based interactive mapping system that accesses an ArcIMS Map Service running on certmapper.cr.usgs.gov. in format Image Map Service (WorldGulfofMexico) (version 9) ArcIMS Image Map Service |
|---|---|
| Network links: |
<http://certmapper.cr.usgs.gov/pubs/servlet/MapViewerBroker?project=world&Service=WorldGulfofMexico&OVMap=WorldGulfofMexico_overview> |
| Data format: | Contains polygon features depicting geologic contacts of the Gulf of Mexico, in addition to other geology-related features. in format ArcGIS Geodatabase File (version 8.3) Size: 17.9 MB |
|---|---|
| Network links: |
<http://certmapper.cr.usgs.gov/data/we/ofr97470l/spatial/geodatabase/gulfofmexico.zip> |
This product can be downloaded individually using any one of the digit form, network resource name URLs above. Each of these URLs may provide access to various formats of the same product. To order the larger work such as the entire CD-ROM the dataset was published on, please use the contact information provided above.
U.S. Geological Survey, Central Energy Resources Team
c/o Christopher D. French
GIS Specialist
U.S. Geological Survey, Box 25046, MS 939, Denver Federal Center
Denver, Colorado 80225
USA
303-236-1655 (voice)
datamgt@usgs.gov
- Contact_Instructions:
- For inquiries regarding this document, please include the metadata contact person's name, dataset name, and publication series and number.